Dissolving apparatus for stereopticons.



C. H; PARTlNGTON. DISSOLVING APPARATUS FOR STEREOPTlCONS.

APPLICATION men MAR. 3|. 1915.

Patented Feb. 22, 1916.

'4 SHEETS-SHEET l- I 51mm W, (lawman Tm: coumnm PLANuqRAPII cm,WASHINGTON, n, c.

c. H. PARTINGTON.

DISSOLVING'APPARATUS FOR STEREOPTICONS.

AFPLICATlON FILED MAR. 31. 1915.

1,172,628. Patented Feb. 22,1916.

J] a 4 SHEETS-SHEET 2.

APPLICATION FILED MAR. 31; I915.

Patented Feb. 22, 1916.

4 SHEETS-SHEET 3 CjiPaz-Jary'ora.

qwbbnamo INGTON. D C.

COLUMBIA PLANO G. H. PARTINGTON. ADISSOLVING APPARATUS FORSTEREOPTICONS. APPLICATJON FILED MAR-'31, 1915.

1,172,628. Patented Feb. 22,1916.

' 4 SHEETS-SHEET 4.

Gaby- 41227 2076.

THE COLUMBIA PLANOGRAPH co., wAsmNuToN, D. c

CHARLES H. PARTINGTQN, or cnvommrrr, OHIO.

' DISSOLVIN APrAItAErUs Fort srEREoP'rIooNs. r

7 To all whom it may concern Be itknown that I, CHARLES H. PAR-'l'INGTON, a citizen of the United States, re-

siding at Cincinnatirin the county ofHamilton and State of Ohio, haveinvented certain new and useful Improvements in Dissolvlng Apparatus forStereoptmons, of

which the following is a specification.

This lnventlon relates-"to view dissolving and slide shifting apparatusfor stereopti cons, and has as its object to provide an apparatus of theclass mentioned adapted to permit of more convenient exhibition of thestereopticon views and in amanner to produce the most pleasing effectsand wlthout lmposlng any strain'upon the eyes ofthe spectators.

Inthe exhibition of stereopticon views] and-where the views aredissolved one into "another, it is customary to employ two slidecarriers, two sets of lenses, and ordinarlly two lamp houses' One methodpursued 1s to gradually dim the light within one of thelamp houses so asto cause the ploture,

projected from the slide in the slide carrier associated with thatparticular lamp house and associated lenses, to fade from the screen andto simultaneously increase the intensity of the'light in the other lamphouse so as to cause he pro ect1on with gradually 1ncreasing lntensltyof a picture upon the screen from the; other one of the slides. This,

method is not adaptable for use in connectlon with all of the variouslllumlnatmg systems employed, and furthermore, considerable-care andattention onthe part of'the' operator is required in order that theslides may beremoved and inserted at the proper moment. In another wellknown type of apparatus; employingtwo sets of lenses and two slidecarriers, the lens mounts are equipped with iris diaphragms and thelevers of the diaphragms are connected by a rod which may be sh1fte d soas to cause one of the diaphragmsto gradually close as the othergradually opens. While this particular type of apparatus maybe employedwith o practically any system of illuminationynev ertheless, the samecare and attention'is required on the part of the operator 1nmampulatlng the slldes. r

In view of the defects which are presented. b th methods of projectionabove pointed Specification of Letters PatentJfl Patented Feb; 22, 1916.

Application filed March 31 1915. Serial No. 18,344.

out,'the present invention aims to provide a view dissolvingand slideshifting apparatus for stereopticons, so constructed that the operationof a single crank, by the operator, will result in thecompletebut gracLual automatic occultation of a slide being X-i hibited; the shiftingof atube slide carrierimmediately subsequent to the occurrence of'fltheperiodof; complete occultation so as to position another slidefor" projection the gradual and complete illumination. of the lastmentioned slide; and, the gradual-and complete occultation of the lastmentioned slide or view. 7 j 7 The invention contemplates further thatthe results abovementioned maybe secured with theuse of but a single'setofflenses,

carrier and a single "source of a single slide illumination. 7 v V Inthe accompanying drawings: is a sideelevation of the apparatus embodyingthe present inventionapplied to a well known? type of stereopticon. Fig."2 'is a front elevation of the apparatus removed.-

Figure 1 Fig; dis a side elevation of the apparatus.

in detail. Fig. 4; is'a plan view of the appa-1 ratus. Fig. 5 1s a groupdlagrammatlc vlew. F1g. 6 1s a vertlcal longltudmal sectlonal view onthe line 6 Gof Fig. 2. Fig 7- is a vertical tr ansverse sectional viewon the line 77 of Fig. 3. Fig. 8 is a reareleva- 5 tion of a portion ofthe apparatus.

lcorrespondingand like parts are referred 7 to in the followlngdescrlptlon and 1nd1- ca ted in all the views of the accompanyingdrawings by the'sarne reference characters;

In'the drawings there is illustrated'in a; general way astereoptlcon, ofwhich the lamp house is indicated by the numeral l',

the lens board by the numeral'2, and they" lantern slide carrier frameor support by the numeral 8. -The lens board 2 is equipped v withtheusual lens mount- L and this mounftis provided w th an lrlsjdlaphragm 5.The

'lens'board 2 and the slide carrier frame 3 are connected by the usualbellows '6 and slidably and removably mounted in the frame 3 is a doubleslide carrier 7. As'all of'these parts "are of the ordinary construe-f Ition, theyare not illustrated in detail nor is it"deemed necessary tospecifically describe! the same.

The apparatus embodying the present in; M

vention is supported upon the lens board 2 and slide carrier frame 3 andthe-support ing structure includes a forward bracket 8 having a topflange 9 and side flanges '10, this bracket being disposed upon the topof the lens board 2 and being secured thereto by means of setscrews 11which are threaded through the side flanges and which bear against thelateral edges ofthe said lens board. This bracket includes forwardly andupwardly extending arms 12 provided at their upper ends with sleeve ofthe slide carrier frame 3 in the manner clearly shown in Fig; l of thedrawings. Set screws are threaded through the flanges 19 and bindagainst the sides of the frame and serve to hold the bracket in placethereon. 'As before stated, .the lens board 2 and slide carriersupporting frame 3 are connected by a bellows 6 and it will beunderstood that infocusing the stereop ticon the set screws 15 areloosened and the lens board, is adjusted with relation to the slidecarrier frame, after which the set screws are tightened so as to bindthe rods 14.

The means provided for shifting the slide carrier 7 includes a rack bar21. which is slidablv mounted in sleeve portions 22 formed integral withthe top portion 18 of the bracket. This rack bar 21 is preferably squarein cross section and adiustablv fitted upon each end thereof is a collar23 held at adjustment by means of a set screw 24 and provided with adownwardly and rearwardly curved finger 25. hen the frame 18 has beensecured to the supporting frame3 for the slide carrier the'collars 23are adjusted upon the rackbar 21' so as to bring the ends of the fingers25into clamping engagement with the ends of the slide carrier 7, afterwhich the set screws 24 are tightened. The bracket 18 is furtherprovided with abearing 26 in which is rotatably mounted a shaft 27carrying a beveled pinion 28 and asegmental gear 29, which gearcoiiperates'with the rack bar in the manner clearly shown iii-Fig. 8 ofthe drawings. Rotary motion is imparted to the shaft 27 in a mannerwhich will be presently explained.

The numeral 30 indicates a supporting frame having sleeve portions 31which fit the rods '14; the frame extending between the said rods andbeing provided at an in termediate-point with a vertically disposedsleeve portion .32 in which is secured the lower reduced'iend 33 of afixed shaft 34. p

A sleeve 35 is rotatably fitted upon the shaft '34 and held againstupward displacement bya-cap washer 36 and securing screw 37, the washerbeing disposed against't-he upper end of the, -shaft and being held inother suitable processand also fixed upon At this "point it will'bexapparcnt that all? of thegears 39, 41 and-4.3- rotate in unison withthe-sleeve and tall of these gears are of the beveled typeand, the gears39 and 41 have their bevels presented toward each other. The gear 39 isprovidedwith a series of teeth; 44 which extend throughout an arc ofsubstantially degreesand with a series ofwteeth 45 which i also extendthroughout anarc of substantially 45 de: grees, and the adjacent ends ofthe two series of teeth 44 and 45 are spaced apart an angular distanceof; 90 degrees. The gear 41 is :providedflvith a single series of teeth46 which. extend throughout an arc of .45 degrees and this series isspacedfrom the series of teethy44 of the gear 39 an angular distance of45 degrees and frlomathet series of teeth 45=of the said gear 39 anangular distance of 90 degrees. 43 is provided with a continuous-uninter-; rupted series of teeth 47 By reference to'Fig; 3 it will beobserved i that the pinion28 lies-between the gears-39 and 41 and isarranged to cooperate with the series of teeth 45. The bearingframe 30is provided, at one side with an upstanding laterally disposed arm .48having a bearing 49 at its upper end in which is rotatably mounted ashaft 50having fixed upon; it abeveled pinion 51 meshingwith the teethof the gear. 43. A. crankfhandle 52 is fixed uponthe shaft 50 and may beturned for the purpose of impartingrotary motion to the gear 43 andthroughthe sleeve 35 to the gears 39 and 41. A hearing frame 53 isprovided at its opposite sides with sleeve por- T he gear;

tion 54 which fit the rods 14 and are secured i thereto vby 11181111801?set screws 55, and'this bearing frame "18 provided between its sleeve"portions 54 with a bearing 56 in: which is rotatably mounted'a shaft 57,having fixed upon it a beveledpinicn 58 which lies betweenthe gears 41andflis designed raaaeae to mesh'with-and be rotated-by cooperation withthe gear teeth island i6 upon thesaid gears 39 and 41 respectively. 7, a

The shaft 57 constitutes an elementof the means provided for openingandclosing the diaphragm 5, and thisme'ans will; Owbe more fullydescribed. The shaft- 57 issupported also in a bearing portion 59 upon abearing frame 60 which is providedwith sleeveportions6l engaging therods 14' and secured. thereto by means of set screwsj62.

The shaft 57' is providediwith akey-way 63 in which is slidably receiveda key 64 carried by the. hub of a; pinion 65. The nu-' meral 66indicates a sleeve which is rotatably mounted upon the shaft 57 inadvance of the pinion 65 andi fixed in any suitable manner upon thissleeve 66 at the rear. end thereof is the hub portion ofa segmental gear67; I In a like manner, a collar 68 is fixed upon the sleeve and thiscollar is provided with an arm 69' which extends up- 'wardly andlaterally therefrom and which serves a purposeto be presently explained;A collar 70 is fixed upon the shaft-'57 by. means of a set screw. 71 andserves to retain the sleeve 66 against longitudinal-movement,

upon the shaft and yet permit of the same rotating freely. The bracket60 ;inclu des,- in addition to the bearinglportion 59, a bearing portion71 located. below the portion 59 and, having fixed therein thereducedportion of: a stationary shaft 72. i- Rotatabl'y mounted upon theforwardjendof thislshaft is a sleeve 7 3 having securedupon itasegmental gear 74 and aisegmental gear 7 The gear;

7 i meshes with the pinion 65 and is; driven therefrom, and the gear? 5meshes with the. gear-67 and imparts motion.- thereto and through themedium of the sleeve66to the" arm 69, when the shaft ,57 isrotatedunderconditions topbe presently fully pointed out.- Piv'otally connected tothe upper end of the arm 69 is the upper end of av-link 76 provided,with spaced'set screws 77 which are will be correspondingly swung andthe diaphragm 5 will be opened. vOn the f'other hand it will beunderstood:'that'fafter thej arm 69 has been swung downwardly andmovement lnva reverse direction ls inparted to it, the 16V. 81'-80will-be swung upwardly thereby closinggthe said diaphragm:5.'. As;

the-ordinarydiaphragm is not constructed to completely close and as; itis necessary that therehe a total occultation-of. the light betweenperiods of projection, there is tpro-- vided ashutteriarrangement whichoperates. a in (conjunction with the; -diaphragm and which comprises anarm off relatively thin material; indicated: at 82; and pivoted v at 83'to. the mounting for .thediaphragm 5. .This

arm is curved adjacent its'pivot; seat 84, 3'

and is provided at its; fre'e 'en'd withgaslot 85 which slidablyreceives the shank ofathe scrjewBl. The concave edge of the curvedportion 84; ofthe shutter arm 82 is provided with a projecting leafportion 86 and it. i

will be observed by reference to Fig. 2; that -when the. diaphragm 5 isclosedythe shutter ar11 r1-8 2 will-be; in 'suchposition that its lever.

p0rti0n86 will-cover the openingleft be tween the inner ends of theleaves of the diaphragm; However,- as the arm 69 is swung downwardly and,the. diaphragm is gradually opened, 'the'shutter arm 82 .will also beswung'downwardly and-its curved portion 8a will clear thegraduallywincreas ing openingfresulting a from f the relative movementof the diaphragmleaves-Y5. 1 F1g.'; 5 comprises a series of diagrammatic views illustrating the relative move v ments of the gears 39.andlland thespinions 28 and 58,- and inea'ch of these viewstheseveral-{gearportions and pin ions are-indie" 'c'atedby-their associatedreference numerals.

and each viewiszdesignated'by legends indicating the distances and thedirection in which the'lcrank handle 52 hasbeen-turnedimm'ediately'prior to the gear portions and pinions assuming the.-'relative positions shown in saidfview;

In the operation of the apparatus,assum-" ing the slide: carrier to beatthe rightfhandr; limit of itsshifting movement and-the gearportions44'', L5 a'ndAG tobe in the relative positions shown in that onegofthediagrammatic views indicated at A, as also the-pin ions 28? and-'58,:the left hand-one of the lantern. slides will be in position for'projec-E tion and the diaphragm will be open; The crank v52 is now givena-half turn forwardly:

and as it is' so moved the gear portion 44f will coeperate with thepinion 58 to rotate the shaft 57. :and gradually close: the dia} phragmthrough the medium of the-arm 69 V and. the elementsassociatedtherewith. At 3 theendof'this movement of the crank '52;

the gear-portions will be in'the relative posi tions'shown inthat one ofthe diagrainmatic viewsiindicated at vB. The 'rotatioir'of the" crankhandle 52 ginthedirection stated then Continued for another h'alfturnand" during this movement of the crank the: gear portion 45 will: passthe pinion 28, rotating; the same i and imparting movement to; the

rack 21 through :thevmedium ofthe =seg f 4e; and the diaphragm will hegrjachiallfy turned to" permit oi -projection of the right handlelantern slide in 'the'*slide carrier.-

Theleft hand lantern slide is; then removed After and new onest'ilostitnted there-fort.

' the righthand slide has been: projected the desired length of tiinethe :c' 'arn1'ehene1e -52 is turned in a rever's'e direction" throughonehal'f turnfl and this will resdltiri'thegear portion 46 aga n passingthe p1n1on 58; hilt in a'reverse direction, so'as to again grad uallyclose the diaphragm. The movement of the crank handle" in the direction"stated iseontinned' fortanot'her' halftem, Whih will result in 'the gearportion changing-i, from the positions shown in-vieW to that shown in-view F ofiFig. 5, andii'n such movement of: the gears, the gear portionwill pas'sthe-pinion 28 iand=- the slide carrier will again beshiftedtoward" the right so as to' bring theme-W slide intoiposition forpro- 7 jeetion'," the diaphragm in-the meantiiile'reclosed. A continuedmovement of the crankihandle-in"the direction stated for another halfturn will eanselthe ge'ar portion to pass the pinion 58"and" the'diaphragin will; be: raduall opened so aswto permit "of projeeti'on ofthe" new slide.

From' the foregoing d'esoripti'on .ofithe invention it Willbfi' seefithatiit is necessary to:enip1oy"but" a single source of illuniinationzand" but a single set "of eondensing and proj'eeting lenses andthat the slide carrier anddiaphragniare' moX ed at proper inter valsand"automatieafly merely upon rotating. the-Crank 52." As a consequenceiti's'only necessary for-the operator of th'e ma'chine to. turn thecrankat"thexdesi-redrateof speed and to remove and replacethe"slides-atthe occurrence of each period of' total oceulta- 'tionz' theelaimsrefer'ence isirnade to view dissolving means; This' eXpressi'on isin- V tended to define any meanswhatsoever op I 'abl'e-for'usein:stereoptieonprojection.

enable-to dissolve or fadewaviewlandthen illuminate the szime'. alsoreferred to a lensset and by tlliS iS' meant any well knownor'p'referredf arrange ment of condensingand rojectinglenses or anyarrangement oflenses whatsoever suit- The elainis also refer to21*131036011011' apparatus including asingle source :of illumination andinLthis respeet-they are intended to dis- In-ithe; claims I have ting'ui'sh from" an eppaeatus" 1M1unmg-=sve lamp heu'se's" or" two sour-eelsof illiiniination or, in other words; doiible project'i'ori' zippara'msw rrevingthus deem-bed the inventiomfi hat is claimed-"- as new is1"'.' In projeetio'n appetrzitnso'fthe clgg i described, wlfiiekapparatus embodies: a

singl source of" illumination and: a single" lens set and a" lensshutter, a reeipetcawry' 1 slide-barrier a'et'nat'ing member; rnfeniber'for the-shntt'en'ashaft liax' rng opera ative Connection" Witli'tlieslide eari-iei shift-1 in}; member, a shaft 'havin'g operative coneneetion" with: the a'ct'iiating member? for" the v shutter, ehdgeanmeensoperable to a te the said s'hztffs in predetermined kse qnence.

et rnf projeevioe apparatus of t11ee1 assdescribed including a;slideCarrie]? and an on culting shutter; a shiftable m'ernbenfo'r' aetu-8 5 ating the slide carrier, means for shifting;

the member to successi ely present the slides;

carriedwh reby for projection, ,nieans "for actuating-the" shuttertoalternately secur illumination-end 'oc c nlt si-ti'on; and meanscommon" to the two last mentioned fxneans' operable-to aeti'iete'the-same irr rdeten' mined sequence.

scribed inel uding e slide Garner; and an 60- chltingL-shntter', spacedhevmgygen portions" relati'x' elyangularly snaed each of said opeeating'means-a inelnding"af gears earried by the shafts em 1opemtingf betvVeeri' the fir s't mentioned gears; and fer im arting messy inotioii'were first mentioned gears-whereby to} cause their 'eetionappeiratus lofthe haste y gear portions to cooperate with the ears the" shafts in:redetermined seqiieneei :4. :In' projection apparatus of t'h'e' classd'e':

sensed; which a i'pairatns -einhodies a! siege;

source of'i'lluinihati'on' and e single'ilenshsit and a lens shutter; arecipijooetory slldef car;

riei a'e'tu ating member including; a reek Y has a"g ea r"elelnent forcooperation with thera'ck; bar; spaced-gears rotatable-"4n unisonzxand.having relatively angnlarly positioned gear I segments; a em o eratieelyconneeted with the'first-inentioned gear lement and Work; mg between thelast-mention d gears;-means for r'otatingthe last -mentioned" gears,- a?

shaft *mounted' for r(' tation,2 a :geer Ieleinent carried thereby" and"also? working between i the lastqmentioned gears; and operative conneetion between the last-mentioned and the" sail d shlitter;

' 51:. lnzprojeotionapparatusof-the class d e scribed-"Whichapparatusembodies a single source": or illumination anda single lens set and alens shutter, *a= rotatable shaft; gearscarried by the shaft andhavingftheir' toothed faces presente d towardaeaeh other in:

spaced rel'a'tiong the saidgears: having 1 segments relatively angularlydisposed, at nection beti'veen the said shaft and the lens tioned gear,means for rotating the firstgear Working between the first-mentionedshutter, v, 10 gears, a slide carrier actuating member op- In testimonywhereof I aftfix my Signaerated through the rotation of the last-menturein presence of two Witnesses. 1

CHARLES H. PARTINGTON. 1,. s.] i mentioned gears in unison, a shaft, agear Witnesses: 7 carried thereby and working between the 3 VG; A.'GIN'I'ER, first-mentioned gears, and operative con- Grim-ASHTON,

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' Washington,.D. 0.

